@mixin size($width: 100%, $height: auto, $sizing: border-box) {
  width: $width;
  height: $height;
  box-sizing: $sizing;
}

@mixin font($size: inherit, $lh: inherit, $color: inherit) {
  font-size: $size;
  color: $color;
  line-height: $lh;
}
